Everything is filler until Rocky comes back. The AJ/Cena storyline is just like the Eve/Cena/Kane/Ryder storyline. Just filler shit until the big boss comes back in Jan.

The difference was that the Ryder/Kane storyline was to give Cena something to do between TLC and Elimination Chamber until the Rock would come back and his WrestleMania program with the Rock would start. Here, even if Rock returns, his focus won't be on Cena, rather it will be on CM Punk instead, so Cena wouldn't have anything to do with the Rock regardless. If anything, Ryback is the filler being used to keep Punk busy until Rock comes back.

You bring up the Cena/Kane/Ryder/Eve storyline from earlier this year, and it's kinda funny that in this current storyline Cena seems to be in the "Zack Ryder" role as the storyline seems to be more about the feud between AJ/Vickie and Cena is just being taken along for the ride, just like Ryder was taken along for the ride during the Cena/Kane feud.